Blade for fabric-cutting machines



A l. APPLBAUM -BLADE FOR FABRIC CUTTING MACHINES Filed Dec. 14, 1922 2 Sheets-Sheet l D qw A l. APPEL!BAUM y BLADE FOR FABRIC CUTTING MACHINES Filed Deo. 14, 1922 2 sheetsfsheet 2 l5 A INVENTOR:

. TTORNEYS.

Patented Dec. 29, 1925.

ISAAC APPELBAUM, OF PHILADELPHIA, PENNSYLVANIA.

BLADE FOR FABRIC-CUTTING- MACHINES.

Application flled December 14, 1922. Serial No. 606,773.

To all whom z'tmcy concern: consists can be variously arranged and or- Be it known that I, Isaac APrnLAUM, a ganized and that my invention is not limcitizen of the United States, residing in the ited to the precise arrangement and organicity and county of Philadelphia, State of Zation of these instrumentalities as herein Pennsylvania, have invented a new and useshown and described.

ful Blade for Fabric-Cutting Machines, of Figure l represents aside elevation of the which the following is a specification. lower portion of a fabric cutting machine My invention relates to a novel fabric or constructed in accordance with and embodycloth cutting machine and more especially ing my novel invention.

1o to machines of the reciprocating type, for Figure 2 represents a vertical section es cutting piled fabric, and to a novel constructhereof.

'tion of cutting blade or knife and a mount- Figure 3 represents a fragmentary, botmg therefor. tom plan view of the slide foot and channel The invention further comprehends or of the machine.

consists of a novel construction in a blade Figure 4 represents a side elevation ofthe 7a and a mounting therefor, whereby the blade blade. is steadied and positively guided in its move Figure 5 represents a perspective view of ments to accurately cut the cloth or other` a guide plate employed in connection with fabric in piles; to render the blade reversithe blade and guide channel. j

no ble in use and to relieve the blade of longi- Figure 6 represents a horizontal section 755 tudinal and lateral stresses to which it is on line 6-6 of Figure 2, and showing the subjected during the cutting action, and to guide vplate in one position. compensate for inaccuracies or imperfec- F gure 7 represents a view similar to Figtions in the blade, especially where the same ure 6, but showing the guide plate in an- 35 or its cutting edge or edges are not true, but other or reversed position. 8c are wavy or irregular, resulting particularly Figure 8 represents a vertical section simifrom the thin character of the blades. lar to Figure 2, but showing in conjunction The invention consists further of novel therewith a novel form of transversely yieldmeans for cleaning out a vertically extendable or floating head to which the blade is ing guide channel in the guide-standard of connected. as the machine between the cheeks of which Figure 9 represents a vertical, sectional the knife or blade reciprocates up and down, view taken on section line 9 9 of Figure 8. so as to edectively prevent any binding due Figure l0 represents a horizontal, secto the splaying out and disintegration of tional view on section line 10-10 of F igthe material during the cutting action enure 8. ao tering the guide channel, in addition to pre- Figure 1l represents a disassembly perventing the breaking of or injury to the spective view, showing the slidable mountblade and ensuring the free working thereof ing and head of the blade. at all times. Similar numerals of reference indicate A further object of the invent-ion is to corresponding parts. 95

protect the inoperative cutting edge of the Referring to the drawings; j

blade while the machine is in use, so that l designates the lower portion of the there will be no dulling or straining, and frame or motor of a fabric cutting machine whereby an effective cutting action will be of the reciprocating blade type, having a produced when the blade is reversed bracket 2 provided with a relatively narrow ico It further consists of other novel features vertical guide standard 3, divided at one of construction and advantage, all as will be edge to provide a blade retaining slot or runhereinafter fully set forth. way 4, communicating with a guide channel For the purpose of illustrating my inven- 5, in which blade slot and guide channel, a

tion, I have shown in the accompanying blade 6 is adapted to reciprocate. 105

drawings, a form thereof which is at present The blade G is positioned so that one of it preferred by me, since it will give in praccutting edges 7 projects from the forward tice satisfactory and reliable results, aledge of the standard 3, above which the verthough it is to be understood that the varitical, slidable mounting 8, driven from the ous instrumentalities ofwhich my invention motor in the usual way, is adapted to recip- 110 (lll rocate in alignment with said standard and the blade-runway 4 and guide channel 5 which extend longitudinally of and within the standard. The slide or mounting 8 is provided with a head 9 designed to move therewith, and this head projects outwardly in a horizontal position, supported between the two spaced or bifurcated jaws 10 of the mounting 8 and receiving .a horizontal pin 11 on which the head is allowed slight lateral play, hereinabovereferred to as floating The aperture 12in the head 9 is slightly larger than the pin 11.-

The head 9 is further provided with a rigid and integral depending jaw 13 while a removable jaw 14 co-operates with thejaw 1:3:

A removable jaw 14' cooperates with the jaw 13 and has a threaded shank l'designed to enter an aperture 16 inthe rigid jaw 13 and a pin 17 to enter a hole 18 to retain the separable or detachable jaw v14 against pivotal movement. The opposing faces of the jaws 13 and 14 are roughenedor lrnurled as indicated" at 19, sot'hat when the threaded shank 15 is inserted in the aperture 16 to bring the jaws together in assembled relation, a nut lor other fastening-device 2O may be mounted thereon to firmly clamp they upper end of the blade 6, in a manner shown in Figures 8 and' 9.

As before stated, the'blade 6 is adapted to reciprocate in the guide channel' and blade slot 4V and is provided with opposed' longitudinal cutting edges 7 and also provided with cutting edges 21 at its opposite ends, designed to effectively sever the top and bottoni layers of thefabric as the machine is advanced along the marks of the piles of fabrics during the cutting action.

The blade Gis provided at spaced points from each end with' rectangular or other polygonal openings 22, pairs of such open ings ybeing arranged adjacent but in spaced relation to the cutting edges 7 and these openings are designed to receive rectangular projections 23 extending from one face of a guide plate 24. The guide plate 24 has flange'25 along its rear edge and when the projections 23 are inserted in the openings 22 of the blade adjacent either one of the cue ting edges, in the manner shown particular'- ly in Figure 2 of the drawings, the plate may be inserted in the slot 4, and the guide plate 23will be a'cco'minodatedin the channel 5, against the back portion 26, which serves as a reinforcementV and wear member at thev bight portion of the limb channel. The front edge of the guide plate is in spaced relationship to the front ofthe channel 5 as indicated at 27, thus preventing wear on that edge of the guide plate andthe adjacent wall of the channel, but the guide plate fits against lone inner side face of the Vchannel so as to render it possible to thoroughly lubricate the working parts and positively guide the plate in its reciprocating movements in the channel or runway.

In addition, the ends of the guide plate are cut square and substantially form shearing edges which will cut or clear the channel of all foreign matter, splayed out fabric or disintegrated parts thereof, such as would be likely to cause a binding action and restrain the plate from working freely in the channel, thus preventing the breaking, bending, or mutilation of the blades.

The blades, in practice are made of rela'- tively thin material andthe. cutting edges are oftenirregularor tortuous and therefore the guide means willserve tov positively direct the movements of the blade to accurately cut the cloth or other fabric as the machine is advanced across al tableon'which the cloth is placed, through the instrumentality of a base 28, to which the lower end of the limb' 3 is secured through they medium of the usual foot 29 and which is provided with a recess 30'receiving the lower end of the limb, as is clearly seen in Figure Bof the drawing;

It may also be stated that the lower end of the blade moves into the footon its downward stroke in cutting through the fabric, when the cutting edge 21 at the lower end of the blade is particularly effective in use, the lower portions only of the cutting edges 7 are active to cut the cloth and consequently the wear is mainly on these portions, but by reason of the construction ofthe blade as shown and described, a reversible double edged blade with four-cutting portions is provided, thereby' augmenting' the life and usefulness of the blade.

This is especially due to the' fact that thev blade can be reversed in respect to its cutting edges and also' inverted with respect toits cutting edges 21 at its ends.

Furthermore, by reason of the clamping device includingthe jaws 13 and 14 and the floating or transversely movable headl 9, which compensates for inaccuracies of the cutting edges ofthe blades, it is unnecessary to provide openings at the ends of the blade to secure it in position for reciprocation, that is, to connect it to the driving means through the medium of the clamping head. This not only makes the construction more economical, but provides a bladeV having imperforate ends which are disposed at right angles to the longitudinal cutting edges, thereby greatly facilitating the manufacture of the blades.

rIhe guide plate 24 may be reversed in position in the manner shown in Figures 6 and 7 of the drawings, so that the flat portion or body of the guide plate', as indicated at 31, is disposed in contact with both inner faces of the channel 5, thus cleaning both sides of the channel andv tending further to prevent any clogging thereof or collection lll of gummy or foreign matter upon the inner faces of the channel.

From the construction above described, it will be seen that as the blade is reciprocated, it will be positively guided in its movements, whereby its cutting edge will always work in a direct vertical plane perpendicular to the pile of fabric and the possibility of the blade shifting at an angle either laterally or inwardly is positively prevented by the guide 24, owing to its manner in which the blade is connected to the reciprocating slide, through a floating clamp head. Since the head 9 is allowed a slight lateral play, all angular stresses are eliminated by the transverse or lateral yielding movement of the head between the bifurcated jaws l0 and on the pin ll.

It may also be stated that the aperture l2 is preferably of circular cross section and allows a slight pivotal movement of the head 9 about a horizontal anis, so as to eliminate all torsional stresses or strain which would otherwise tend to break or bend the blade.

As seen particularly in Figure 1l of the drawings, the head 9 is substantially I- shaped in vertical section, thus providing top and bottom flanges 32 to engage above and below the bifurcated jaws or plates l0 and thus to form a firm connection, in a vertical direction between the floating head 9 and the slide member 8 formed integrally with said bifurcated jaws l0, while allowing the necessary universal yielding movements of the head for the purposes above specified.

In the use of the device, the upper end of the blade is inserted between the clamp jaws 13 and 14, after the application of the guide plate 24 and the insertion of the blade together with the guide plate into the slot 4 and the channel 5. The nut 2O is then turned to clamp the blade between the clamp jaws, the knurled faces 19 firmly holding the blade in position. Owing to the slidable mounting of the blade, it will be positivelyguided in a vertical line so as to give accurate cutting action, and yet, undue stresses to which the blade is subjected in use, both laterally and horizontally, as well as inwardly and longitudinally, will be compensated for by the shifting or floating of the head on its mounting, and thus breaking of or injury to the blade is prevented.

It will now be apparent that l have devised a novel and useful construction in fabric cutting machines, which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description, and while I have in the present instance shown and described the preferred embodiments thereof which have been found in practice to give satisfactory and reliable results, it is to be understood that the same are susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

ilaving thus described my invention, what lclaim as new and desire to secure by lietters llatent, is

l. ilvertically reciprocable knife for fabrif cutting machines having opposed vertical cutting edges and a plurality of openings i inged in a group intermediate said cutting edges.

2. Si vertically reciprocable knife for fabric cutting machines having opposed vertical cutting edges and iniperforate ends, and a plurality of openings disposed in a group ,spaced relation intermediate said cutting lges.

Fl. It vertically reciprocable knife for fahric cutting machines having an opposed vertical cutting edge and a plurality of cutting earners fer said cutting edges.

4.. l vertically reciprocable knife for fabrie cutting machines having opposed vertical cutting edges and a plurality of openings spaced apart at, uniform distances arranged intermediate said cutting edges.

5. A vertically reciprocable knife for fabric cutting machines having opposed vertical cutting edges, imperforate ends and end cutting corners, and a guide plate having projections adapted to detachably engage the knife.

(l. A vertically reciprocable knife for fabric cutting machines having opposed vertical cutting edges, imperforate ends and end cutting' corners, and a centrally arranged group of openings uniformly spaced from said edges.

T. si vertically reciprocable knife for fabric cutting machines having opposed vertical cutting edges and a plurality of openings spaced from said edges of the knife and a guide plate having projections adapted to enter the openings.

il. ii vertically reciprocable blade for fabric cutting machines having vertical cutting edges parallel to each other and a guide plate fitted against and detachably connected to the blade in its length.

9. A vertically reciprocable knife for fabric cutting machines having vertical cutting edges parallel to each other and edges at i it angles thereto to form cutting corners, and a guide plate fitted against and conn cted to the blade in its length, said guide plate having a flange in back of the blade spaced therefrom.

l0. A knife for fabric cutting machines luiving spaced longitudinal cutting edges a d opposite pairs of openings intermedia el); of its ends, and a guide plate fitted at; .inst the blade with projections detachably engaged through the openings, and having a flange overlying the back edge of the blade and spaced therefrom.

ll. .E cloth cutting knife of the character described, comprising a vertically reciprocable blade having' a plurality of longitudinal cutting edgesentirely along its longitudinal edges and Cutting edges entirely across its ends.

l2. A- eloth cutting knife of the character deserihed comprising a vertically reciprocable blade having a plurality of longitudinal cutting edges and end cutting edges at right angles threto entirely across its ends.

l. i vertically reciprocahle blade for a Alahrie cutting machine, having opposed cutting' edges and :i guide plete mounted on the blede intermediate of its two ends and adapted to slide Within the guideehfmnelof the machine. Y

#P ln :r: vertically reciprooable bladev for a i torad'eends. and opposed cutting edgesyand a luide plate mounted on one` side of the plate et ite intermediate portion and rigid therewith, seid guide platebeing' adapted to reciprocate in the guide channel or the niachine and to prevent clogging thereof.

remi-o AWELBAUM.

Drie cutting' meehinejV having imper-Y 

